Brazil has a new coronavirus variant, and it is present in about 50% of all new COVID cases in Manaus city

It's mutating.

A newly identified variant of COVID is already confirmed in about half of all new infections in Manaus, Brazil, which raises alarm about a greater risk of spread, a researcher warns on Friday.

From Reuters:

A team led by immunologist Ester Sabino collected genomic data from COVID-19 tests in Manaus that indicated 42% of the confirmed cases were infected by the new variant, which has mutations similar to the British and South African variants.